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⅜ Make sure to firmly install the socket in the anvil. If the socket is not firmly installed it
might come out and cause injuries.
7. Confirm that the battery is mounted correctly
8. Check the rotational direction
The bit rotates clockwise (viewed from the rear
side) by pushing the R-side of the push button.
The L-side of the push button is pushed to turn
the bit counterclockwise. (See Fig. 16).
(The
L
and
R
marks are engraved on the body.)
CAUTION:
● The push button can not be switched while the impact driver is turning. To switch the
push button, stop the impact driver, then set the push button.
9. Switch operation
⅜ When the trigger switch is depressed, the tool rotates. When the trigger is released, the
tool stops.
⅜ The rotational speed can be controlled by varying the amount that the trigger switch is
pulled. Speed is low when the trigger switch is pulled slightly and increases as the
trigger switch is pulled more.
NOTE: A buzzing noise is produced when the motor is about to rotate; this is only a noise,
not a machine failure.
10. Tightening and loosening screws
Install the bit that matches the screw, line up the bit in the grooves of the head of the
screw, then tighten it.
Push the impact driver just enough to keep the bit fitting the head of the screw.
CAUTION:
ⅷ Applying the impact driver for too long tightens the screw too much and can break it.
ⅷ Tightening a screw with the impact driver at an angle to that screw can damage the
head of the screw and the proper force will not be transmitted to the screw.
Tighten with this impact driver lined up straight with the screw.
11. Number of screw tightenings possible (WH12DM, WH9DM)
Please refer to the table below for the number of screw tightenings possible with one
charge.
<WH12DM2> (EB1220BL)
Screw used No. of tightenings
Wood screw 5/32" × 2"
Approx. 530
(Soft wood) (ø4 × 50)
Machine screw
Approx. 1170
5/16" × 5/8" (M8 × 16)
R
L
Push
Push
Push button
Fig. 16